: Indicates the source is a Blu-ray Disc , which typically offers the highest visual quality compared to TV broadcasts.
If this file is for the popular series GATE ( Gate: Jieitai Kano Chi nite, Kaku Tatakaeri ), here is what you need to know: gateanime-com-bech-045-bd-1080fhd-mp4
: A mysterious portal (the "Gate") opens in Tokyo, releasing fantasy monsters and medieval knights. The Japanese Self-Defense Force (JSDF) enters the Gate to establish peace and explore a new world filled with magic and dragons. : Indicates the source is a Blu-ray Disc